A NEW BRITISH STATION OF WOLFFIA ARRHIZA. 263 
or brownish-red flowers, nearly campanulate, and consisting of a calyx 
ouly: within there are six hooded, petaloid, pedicellated bodies, 
answering both the purposes of petal and filament, each containing 
and almost concealing (as in the infertile anthers of the Larkspur) the 
2-celled anthers. 
With the berry and germ I am unacquainted. As in the T. pin- 
natifida, there are interspersed among the flowers numerous abortive 
the flowers. The root of this plant, or the tubers, when pounded 
and washed, afford a fecula, which, under the name of Pia, is used 
extensively in the Sandwich Islands as an article of food, and goes 
among the white residents usually by the name of Arrow-root. 
The present species is readily distinguished from that of India, by 
the broader, more divided, and coadunate M as well as by the 
short and broad leaves of the involucrum; it is also, apparently, a 
larger plant in all its parts, save the flowers 
A NEW BRITISH STATION OF WOLFFIA ARRHIZA. 
Mr. M. Moggridge has been fortunate enough to discover a new 
station of Lemna, or rather Wolfia arrhiza. He found it on July 7, in 
a pool in the second field south-east of St. James’s Church, Waltham- 
stow, Essex. The plant being smaller than a pin’s head, and occur- 
ring in company of other Duckweeds, has probably been overlooked in 
many localities, and it is highly desirable that our correspondents 
should carefully examine their respective neighbourhoods with a view 
of finding this new British plant. We shall be glad to insert any 
communications on the subject that may be forwarded, so that the 
geographical range of this species may be worked out. That it is not 
a recent importation to our islands appears from the subjoined letter. 
British Museum, July 28, 1866. 
About fifty years ago Mr. Bennett and myself had some specimens 
s 
neighbourhood of London, I believe Putney Common. It was col- 
lected by M. Gérard, an old Frenchman, who had been head gardener 
at Versailles, but had emigrated at the first revolution. He was a 
good botanist, and supported himself by collecting plants and selling 
